The symbol brings to mind a yandra, used in Vedic belief structure, among countless others, as a symbolic representation of the divine. In the days before sassy nihilist philosophers it actually represented the presence of the divine. It is related to Islamic geometry, the Rose windows of Europe's great cathedrals, Keplers "celestial physics", and of course, the eternal sacred geometer of the first man to call himself a philosopher, Pythagoras.
In being related to cosmology and mathematics in particular, it is most assuredly a symbol of metaphysics.
The harmony of the geometric forms apparent in this symbol have influenced music, art, architecture, religion, mathmatics and yes philosophy for all of history.
Its symbolic nature can help one "to access progressively deeper levels of the unconscious, ultimately assisting the meditator to experience a mystical sense of oneness with the ultimate unity from which the cosmos in all its manifold forms arises." David Fontana: "Meditating with Mandalas", p. 10